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/* Copyright (c) 2018, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License, version 2.0, for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "my_config.h"
#include <errno.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <stddef.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "my_inttypes.h"
#include "my_sys.h"
// Ignore test on windows, as we are mocking away a unix function, see below.
#ifndef _WIN32
// For testing my_read.
extern ssize_t (*mock_read)(int fd, void *buf, size_t count);
namespace mysys_my_read_unittest {
using ::testing::_;
using ::testing::InSequence;
using ::testing::Return;
using ::testing::SetErrnoAndReturn;
class MockRead {
public:
virtual ~MockRead() = default;
MOCK_METHOD3(mockread, ssize_t(int, void *, size_t));
};
MockRead *mockfs = nullptr;
ssize_t mockfs_read(int fd, void *buf, size_t count) {
return mockfs->mockread(fd, buf, count);
}
class MysysMyReadTest : public ::testing::Test {
void SetUp() override {
mock_read = mockfs_read;
mockfs = new MockRead;
}
void TearDown() override {
mock_read = nullptr;
delete mockfs;
mockfs = nullptr;
}
};
// Test of normal case: read OK
TEST_F(MysysMyReadTest, MyReadOK) {
uchar buf[4096];
InSequence s;
EXPECT_CALL(*mockfs, mockread(_, _, 4096)).Times(1).WillOnce(Return(4096));
const size_t result = my_read(42, buf, 4096, 0);
EXPECT_EQ(4096U, result);
}
// Test of normal case: read OK with MY_NABP
TEST_F(MysysMyReadTest, MyReadOKNABP) {
uchar buf[4096];
InSequence s;
EXPECT_CALL(*mockfs, mockread(_, _, 4096)).Times(1).WillOnce(Return(4096));
const size_t result = my_read(42, buf, 4096, MYF(MY_NABP));
EXPECT_EQ(0U, result);
}
// Test of disk full: read not OK
TEST_F(MysysMyReadTest, MyReadFail) {
uchar buf[4096];
InSequence s;
EXPECT_CALL(*mockfs, mockread(_, _, 4096))
.Times(1)
.WillOnce(SetErrnoAndReturn(ENOSPC, -1));
const size_t result = my_read(42, buf, 4096, 0);
EXPECT_EQ(MY_FILE_ERROR, result);
}
// Test of disk full: read not OK, with MY_NABP
TEST_F(MysysMyReadTest, MyReadFailNABP) {
uchar buf[4096];
InSequence s;
EXPECT_CALL(*mockfs, mockread(_, _, 4096))
.Times(1)
.WillOnce(SetErrnoAndReturn(ENOSPC, -1));
const size_t result = my_read(42, buf, 4096, MYF(MY_NABP));
EXPECT_EQ(MY_FILE_ERROR, result);
}
// Test of normal case: read OK, with MY_FULL_IO
TEST_F(MysysMyReadTest, MyReadOkFULLIO) {
uchar buf[132096]; // Read 129Kb
InSequence s;
EXPECT_CALL(*mockfs, mockread(_, _, 132096))
.Times(1)
.WillOnce(Return(132096));
const size_t result = my_read(42, buf, 132096, MYF(MY_FULL_IO));
EXPECT_EQ(132096U, result);
}
} // namespace mysys_my_read_unittest
#endif
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